Improvement in the manufacture of brushes



UNITEDA STATES VFrisia.

Aralar A. R. DAVIS, OF EAST CAMBRIDGE, MASSACHUSETTS.

Specification forming part of Letters Patent No. 8,299, dated August 19,1851.

To all whom, it may concern,.-

Be it known that I, ABBOT It. Davis, of East Cambridge, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in the Manufacture of Brushes; and I do hereby declare that the same is fully described and represented in the following specification and accompanyl ing drawings, letters, figures, and references thereof. Of the said drawings, Figure l denotes a sectional view of a pattern block or plate, a series of brush blocks or plates, and a collection of bristles as inserted through them. Fig. 2 is a view of the same, but representing the brush-blocks as separated or drawn apart at some distance from one another.

In my improved mode of manufacturing brushes,I take several plates or strips of wood or other suitablematerial, a b e d, and lay them together, or one upon the other, and apply to one of the outer ones a pattern-plate, e, which pattern-plate has a series of holes, v) @'13, &c., bored through it, in such 'number corresponding to the number of bunches of bristles to be inserted in the said brush blocks or plates a b c d. I next, by means of a suitable clamp, confine together the pattern e and all the blocks a b c d, and, by means of a drill or any number of drills inserted within the holes of the pattern-plate, I next bore through all the brush blocks or plates i-n such manner that each hole of the pattern shall be produced or continued directly through the whole series of brush-blocks. I neXt take bunches f f, &c., of bristles and insert them through the holes of the pattern and the brush-blocks until all the holes are suitably filled and the bristles extend from the brush-blocks and beyond the pattern, as seen in Fig. 1. I next, by cement or any suitable means, confine the ends of the bristles within the holes of the first or outer plate, a, or that plate which is farthest from the pattern. This having been effected, Inext separate the brush-blocks asunder, as seen in Fig. 2-that is to say, to such distances apart as shall be equal to the length to which it is desirable that the bristles shall project from each of them when the brush of which it forms a part is completed. I next, by means of a knife or other suitable sharp instrument, separate the bristles orcut them along the back of cach brush-block, so as to leave a series of bristles proj eeting from each brush-block, and of a length sufficient for the brush of which said brush-block forms a part. The bristles of the remaining blocks, b 0 d, Ste., may next be cemented or fastened in their respective blocks, and the brush'completed in the ordinary way.

For convenience of inserting the bristles in the series of brush-blocks, I make use of the pattern-plate, such pattern-plate having its holes enlarged or made with mouths at their outer ends, as seen at m. l

The pattern-plate also affords me the advantage of enabling me to readily place the boring-bits in their proper positions for piercing the brush-blocks.

I do not consider such pattern-plate as necessary to my invention or as making part thereof, but consider it simply as affording conveniences or advantages, as above specified.

My new mode of manufacturing brushes enables me to effect a very great saving both in labor and material over the heretofore-practiced process of making each brush separately.

`What I claim as my invention is- The above described improvement in the manufacture of brushes, the same consisting in laying two or more brush blocks or plates together or upon one another, and either boring them before r afterward, and each with the same number of holes, and so that each hole in each .block shall bein range with a hole in each of the other blocks, and passing or inserting bunches of bristles through all the blocks and fastening the ends of said bristles in the last block through which they are made to enter, and separating the said blocks asunder and cutting the bristles between the blocks, all substantially as hereinbefore set forth.

In testimony whereof I have hereto set my signature this 25th day of April, A. D. 1851.

ABBT. R. DAVIS.

It. H. EDDY, F. Gouin), 

